157897878 has 16 divisors (see below), whose sum is σ = 316624896. Its totient is φ = 52494440.

The previous prime is 157897877. The next prime is 157897891. The reversal of 157897878 is 878798751.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157897877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32058 + ... + 36653.

It is an arithmetic number, because the mean of its divisors is an integer number (19789056).

Almost surely, 2^157897878 is an apocalyptic number.

157897878 is an abundant number, since it is smaller than the sum of its proper divisors (158727018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157897878 is a wasteful number, since it uses less digits than its factorization.

157897878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69099.

The product of its digits is 7902720, while the sum is 60.

The square root of 157897878 is about 12565.7422383240. The cubic root of 157897878 is about 540.4955190956.

The spelling of 157897878 in words is "one hundred fifty-seven million, eight hundred ninety-seven thousand, eight hundred seventy-eight".